31772572442 has 16 divisors (see below), whose sum is σ = 51506296800. Its totient is φ = 14612443632.

The previous prime is 31772572379. The next prime is 31772572457. The reversal of 31772572442 is 24427527713.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31772572393 and 31772572402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2151692 + ... + 2166407.

It is an arithmetic number, because the mean of its divisors is an integer number (3219143550).

Almost surely, 2^31772572442 is an apocalyptic number.

31772572442 is a deficient number, since it is larger than the sum of its proper divisors (19733724358).

31772572442 is a wasteful number, since it uses less digits than its factorization.

31772572442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4318397.

The product of its digits is 658560, while the sum is 44.

The spelling of 31772572442 in words is "thirty-one billion, seven hundred seventy-two million, five hundred seventy-two thousand, four hundred forty-two".